Miktoarm Star Polymers by Other Methodologies Based on Living Anionic Polymerization

4 Miktoarm Star Polymers by Other Methodologies Based on Living Anionic Polymerization 

The ABC star-branched polymer anion thus prepared was then reacted with a chain-end-butyl bromide-functionalized PSiS, prepared from 1,4-dibromobutane and PSiSLi end capped with DPE (yield = 95%). The linking reaction was observed to proceed nearly quantitatively to afford the objective 4-arm ABCD p-star polymer (M = 43 000 g/mol, MJM = 1.04). This is the first successful synthesis of a 4-arm ABCD p-star polymer by the methodology using the dual functionality of the DPE derivative. 

A series of 4-arm A2B2,4-arm A2B2C, and 5-arm A2B2C stars, where A, B, C are PDMS, PS, and PI, were also successfully synthesized by the similar strategy (Fragouli et al, 2006). lypical characterization results are summarized in Table 4.11. Thus, the variety of monomers has gradually increased since 2000, thanks to new methodologies applicable to multiarmed and multicomponent stars. 

5 Miktoarm Star Polymers by Living/Controlled Radical Polymerization 

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